i have three oilcoolerkits for sell. i run the kit on my 135i too. i have downpipes, injen intake, procede map2, fmic, big chargepipe. The kit works great and the oil temperature are at 112-114 Degree when i drive hard.

My kit works with setrab core and Teflon hoses. The original core remains. It is also possible to install a larger cooler (Singleturboupgrade.....).
I'm from Germany
I sell the kit for 615 Dollars + 50Dollars shipping. Thats the cheapest offer.